Bright pixel on Windows 7 Desktop

[obee]

Hello,

I recently buy a fujitsu laptop with preloaded Windows 7 Home Basic.

After using it for a while, I noticed that there is a Bright pixel in upper left corner of the windows desktop. I'm sure it is not a deadpixel because if I drag a window to that pixel, the pixel will display the right color.

I think it is software related. I already read other thread that mentioning this problem, but he already solved it by disabling an AOL software. But the case here is that I'm not using that AOL software.

the Bright pixel will disappear if I restart the laptop, but it suddenly appear again when I open the "desktop Background" menu.

ANyone can help me? thanx..

 

[richc46]

A dead pixel will always be the same, just less noticeable with different backgrounds. If your description is correct, I doubt that it is a dead pixel.

 

[obee]

A dead pixel will always be the same, just less noticable with different backgrounds. If your description is correct, I doubt that it is a dead pixel.

the bright pixel disappear when I restart the computer.. It will correctly display the background color or any other color on my desktop..

BUT, when I enter the "desktop background" menu, the dot appear and will stay that way Until I restart the computer.

Oh, and the bright pixel can be seen on a printscreen of my desktop. A deadpixel definitely will not appear on a printscreen. So I am sure it is not a deadpixel.

 

[richc46]

Did you try changing the desktop background?

 

[obee]

Did you try changing the desktop background?

There was no deadpixel BEFORE I entered the desktop background menu. example, If I am using a Solid Black desktop background, then all the pixel on my monitor will be black.

BUT AFTER I entered the desktop background menu to change my background, the bright pixel appear on any background that I chose.

 

[DocBrown]

obee,

Can you make some screen shots with the snipping tool & attach them in your post with the paper clip icon ?

 

[richc46]

Did you try changing the desktop background?

There was no deadpixel BEFORE I entered the desktop background menu. example, If I am using a Solid Black desktop background, then all the pixel on my monitor will be black.

BUT AFTER I entered the desktop background menu to change my background, the bright pixel appear on any background that I chose.

If you are curious, does it show if you go to another user account?

 

[obee]

@richc46 : When I switch to another user account, the pixel didn't appear (yet). When I entered the desktop background menu, the bright pixel appear exactly the same as in my other account.

@docbrown : Okay here is the file. Maybe its a little bit difficult to notice the bright pixel because it is located on the upper most left corner of the desktop. I am using solid black to make you easier noticing it.

 

[DocBrown]

I could not find a pic in your zip file. Just use the snipping tool from the Start Menu.

 

[obee]

I could not find a pic in your zip file. Just use the snipping tool from the Start Menu.

I am using the snipping tools. and the file is in MHTML type. the picture is there in that mhtml file.

 

[DocBrown]

Here is what I get in the zip file

 

[obee]

I think the previous file stored the image on my computer, not on the file..

here are 2 jpeg image. the first one is before i went to desktop background menu, and the other one is after.

 

[TheCROW]

That is clearly a white pixel on top of your desktop background. I suspect it is caused by a running application or driver.
If you click on the SHOW DESKTOP icon will it disappear momentarily? I suspect the answer is yes.
The advice I can give you is go to Task Manager and start shutting down active tasks untill the white pixel disappears, then you will know which program is causing this.
PS: It could be a malware as well.

 

[obee]

I had click the SHOW DESKTOP but the pixel didnt disappear.
Here are my running process when the bright pixel appear... any idea which process maybe causing the problem? I am worried if I close the wrong process and something bad happen to my computer..

 

[Qdos]

Doubtful it's down to anything except a hardware screen issue, and since one pixel is within acceptable defect limits there's nothing you can do about it unless your supplier was specifically paid to check for defective pixels or there's a warranty from the manufacturer about an exchange of hardware if you get a dead or bright pixel...

Dell have one of the best policies on this type of fault, other manufacturers don't tend to want to do much about pixellation defects which call within the norms...

The above chart shows what degree of dead pixels are acceptable per million, for various classes of hardware...

Sometimes people claim 'massaging' a pixel with the tip of a blunt pencil can restore normal functionality, however I'm not telling you to try the same...

 

[obee]

I closed the Desktop Window Manager process and now the pixel disappear...

anyone know what cause that? what is Desktop Window Manager?

 

[TheCROW]

DWM is resposible for the aero and eye candy in Win7 and Vista.

 

[Wishmaster]

It could be possible a program/driver is causing it. maybe the Fujitsu Display manager? What is it for?
Boot into Safe Mode, see if its still there.

If so, it could also be a stuck pixel. So there may still be hope.

A stuck pixel will appear in any of the colors that its three subpixels (red, green and blue) can form.
In a dead pixel, all subpixels are permanently off, which will make the pixel appear black.

http://komku.blogspot.com/2008/03/how-to-fix-stuck-pixel-using-udpixel-2.html

 

[TheCROW]

It cannot be a stuck pixel, I had a stuck pixel once and it didn't appear on any snapshot and certainly not on other computers at the same spot!!!
This is certainly a driver/utility causing this and I bet it won't show in safe mode.
As Wishmaster said, try to close the Fujitsu Display Manager and try.

 

[mlevy]

QDos, a hardware issue wouldn't show in a screenshot like his is. I agree with the others in that it's an application that's running.

Try this, use msconfig to run a diagnostic startup (basic devices and services only) and then immediately after the reboot go to the screen where you see the pixel. Does it appear? If so, I suspect maybe an updated video driver is needed. If it doesn't, go back to a normal startup, except use the startup tab to enable 4-5 items at a time with reboots after each "group" to test. When you get the pixel, it's one of those 5.